Answer: A shunt regulator detects output voltage variation via external resistors by using an error amplifier and controls a transistor connected in parallel to the load to keep the output voltage constant. ... The basic operation of a shunt regulator is described below using a simplified circuit.

Where are shunt regulators used?

Shunt regulators are used in: Low Output Voltage Switching Power Supplies. Current Source and Sink Circuits. Error Amplifiers.

What is series and shunt regulator?

A series regulator is connected in series with the load to stabilize the regulator's output voltage. A shunt regulator, on the other hand, is connected in parallel to the load to stabilize the device's output voltage.